Benchmarks for #123610 (Copilot)

[EgorBot]

Processing dotnet/runtime#123610 (comment) command:

Command

-x64 -arm

using System;
using System.Numerics.Tensors;
using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Running;

BenchmarkSwitcher.FromAssembly(typeof(Bench).Assembly).Run(args);

[MemoryDiagnoser]
public class Bench
{
    private float[] _floatData = default!;
    private double[] _doubleData = default!;
    private Half[] _halfData = default!;
    
    [Params(512)]
    public int Count { get; set; }
    
    [GlobalSetup]
    public void Setup()
    {
        var random = new Random(42);
        _floatData = new float[Count];
        _doubleData = new double[Count];
        _halfData = new Half[Count];
        
        for (int i = 0; i < Count; i++)
        {
            _floatData[i] = (float)(random.NextDouble() * 1000 - 500);
            _doubleData[i] = random.NextDouble() * 1000 - 500;
            _halfData[i] = (Half)_floatData[i];
        }
    }
    
    [Benchmark]
    public void BitIncrement_Single()
    {
        TensorPrimitives.BitIncrement(_floatData, _floatData);
    }
    
    [Benchmark]
    public void BitIncrement_Double()
    {
        TensorPrimitives.BitIncrement(_doubleData, _doubleData);
    }
    
    [Benchmark]
    public void BitIncrement_Half()
    {
        TensorPrimitives.BitIncrement(_halfData, _halfData);
    }
    
    [Benchmark]
    public void BitDecrement_Single()
    {
        TensorPrimitives.BitDecrement(_floatData, _floatData);
    }
    
    [Benchmark]
    public void BitDecrement_Double()
    {
        TensorPrimitives.BitDecrement(_doubleData, _doubleData);
    }
    
    [Benchmark]
    public void BitDecrement_Half()
    {
        TensorPrimitives.BitDecrement(_halfData, _halfData);
    }
}

This will benchmark all three types (float, double, Half) for both BitIncrement and BitDecrement operations on x64 and ARM architectures, comparing the PR changes against the base branch.

(EgorBot will reply in this issue)

[EgorBot]

Benchmark results on linux_azure_genoa

BenchmarkDotNet v0.15.0, Linux Ubuntu 24.04.3 LTS (Noble Numbat)
AMD EPYC 9V74, 1 CPU, 8 logical and 4 physical cores
  Job-PLKENN : .NET 11.0.0 (42.42.42.42424), X64 RyuJIT AVX-512F+CD+BW+DQ+VL+VBMI
  Job-HPPJRH : .NET 11.0.0 (42.42.42.42424), X64 RyuJIT AVX-512F+CD+BW+DQ+VL+VBMI

Method	Toolchain	Count	Mean	Error	Ratio	Allocated	Alloc Ratio
BitIncrement_Single	Main	512	442.01 ns	0.460 ns	1.00	-	NA
BitIncrement_Single	PR	512	76.12 ns	0.318 ns	0.17	-	NA
BitIncrement_Double	Main	512	553.49 ns	0.254 ns	1.00	-	NA
BitIncrement_Double	PR	512	152.14 ns	0.096 ns	0.27	-	NA
BitIncrement_Half	Main	512	283.89 ns	0.049 ns	1.00	-	NA
BitIncrement_Half	PR	512	419.49 ns	0.169 ns	1.48	-	NA
BitDecrement_Single	Main	512	439.12 ns	0.102 ns	1.00	-	NA
BitDecrement_Single	PR	512	76.46 ns	0.007 ns	0.17	-	NA
BitDecrement_Double	Main	512	439.18 ns	0.085 ns	1.00	-	NA
BitDecrement_Double	PR	512	152.32 ns	0.034 ns	0.35	-	NA
BitDecrement_Half	Main	512	284.88 ns	0.201 ns	1.00	-	NA
BitDecrement_Half	PR	512	421.93 ns	0.074 ns	1.48	-	NA

Artifacts.zip

cc @Copilot (agent_logs.txt). EgorBot manual: link.

[EgorBot]

Benchmark results on linux_azure_cobalt100

BenchmarkDotNet v0.15.0, Linux Ubuntu 24.04.3 LTS (Noble Numbat)
Neoverse-N2, 8 physical cores
  Job-RYDAJP : .NET 11.0.0 (42.42.42.42424), Arm64 RyuJIT AdvSIMD
  Job-HDTWXS : .NET 11.0.0 (42.42.42.42424), Arm64 RyuJIT AdvSIMD

Method	Toolchain	Count	Mean	Error	Ratio	Allocated	Alloc Ratio
BitIncrement_Single	Main	512	511.7 ns	0.20 ns	1.00	-	NA
BitIncrement_Single	PR	512	273.9 ns	0.03 ns	0.54	-	NA
BitIncrement_Double	Main	512	490.3 ns	0.36 ns	1.00	-	NA
BitIncrement_Double	PR	512	549.9 ns	0.04 ns	1.12	-	NA
BitIncrement_Half	Main	512	346.6 ns	0.10 ns	1.00	-	NA
BitIncrement_Half	PR	512	1,100.6 ns	0.10 ns	3.18	-	NA
BitDecrement_Single	Main	512	489.7 ns	1.41 ns	1.00	-	NA
BitDecrement_Single	PR	512	274.2 ns	0.02 ns	0.56	-	NA
BitDecrement_Double	Main	512	469.4 ns	4.64 ns	1.00	-	NA
BitDecrement_Double	PR	512	549.4 ns	0.05 ns	1.17	-	NA
BitDecrement_Half	Main	512	347.3 ns	0.05 ns	1.00	-	NA
BitDecrement_Half	PR	512	1,111.3 ns	0.08 ns	3.20	-	NA

Artifacts.zip

cc @Copilot (agent_logs.txt). EgorBot manual: link.